WebKit merge 41660:41709 (WebKit side)....

third_party/WebKit/WebCore/bindings/v8/V8WorkerContextEventListener.cpp

+/*
+ * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if ENABLE(WORKERS)
+
+#include "V8WorkerContextEventListener.h"
+
+#include "Event.h"
+#include "WorkerContextExecutionProxy.h"
+
+namespace WebCore {
+
+V8WorkerContextEventListener::V8WorkerContextEventListener(WorkerContextExecutionProxy* proxy, v8::Local<v8::Object> listener, bool isInline)
+    : V8ObjectEventListener(0, listener, isInline)
+    , m_proxy(proxy)
+{
+}
+
+V8WorkerContextEventListener::~V8WorkerContextEventListener()
+{
+    if (m_proxy)
+        m_proxy->RemoveEventListener(this);
+    disposeListenerObject();
+}
+
+void V8WorkerContextEventListener::handleEvent(Event* event, bool isWindowEvent)
+{
+    // Is the EventListener disconnected from the frame?
+    if (disconnected())
+        return;
+
+    // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it.
+    // See issue 889829.
+    RefPtr<V8AbstractEventListener> protect(this);
+
+    v8::Locker locker;
+    v8::HandleScope handleScope;
+
+    v8::Handle<v8::Context> context = m_proxy->GetContext();
+    if (context.IsEmpty())
+        return;
+
+    // Enter the V8 context in which to perform the event handling.
+    v8::Context::Scope scope(context);
+
+    // Get the V8 wrapper for the event object.
+    v8::Handle<v8::Value> jsEvent = WorkerContextExecutionProxy::EventToV8Object(event);
+
+    invokeEventHandler(context, event, jsEvent, isWindowEvent);
+}
+
+v8::Local<v8::Value> V8WorkerContextEventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event, bool isWindowEvent)
+{
+    v8::Local<v8::Function> handlerFunction = getListenerFunction();
+    if (handlerFunction.IsEmpty())
+        return v8::Local<v8::Value>();
+
+    v8::Local<v8::Object> receiver = getReceiverObject(event, isWindowEvent);
+    v8::Handle<v8::Value> parameters[1] = { jsEvent };
+    v8::Local<v8::Value> result = handlerFunction->Call(receiver, 1, parameters);
+
+    m_proxy->TrackEvent(event);
+
+    return result;
+}
+
+v8::Local<v8::Object> V8WorkerContextEventListener::getReceiverObject(Event* event, bool isWindowEvent)
+{
+    if (!m_listener.IsEmpty() && !m_listener->IsFunction())
+        return v8::Local<v8::Object>::New(m_listener);
+
+    if (isWindowEvent)
+        return v8::Context::GetCurrent()->Global();
+
+    EventTarget* target = event->currentTarget();
+    v8::Handle<v8::Value> value = WorkerContextExecutionProxy::EventTargetToV8Object(target);
+    if (value.IsEmpty())
+        return v8::Local<v8::Object>();
+    return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value));
+}
+
+} // namespace WebCore
+
+#endif // WORKERS